Naughty Dog has announced a release date and price for The Lost Legacy, the upcoming expansion for PS4 exclusive Uncharted 4: A Thief's End.

The Lost Legacy follows Chloe Frazer and Nadine Ross as they search for the Tusk of Ganesh. It was recently hinted by Naughty Dog's head of communications that the expansion could be ten or more hours long.

That's one enormous piece of DLC, but it won't come cheap: The Lost Legacy will cost $39.99 in the US. No UK price has been announced.

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The expansion will be available to download on August 23 in Europe and a day earlier across the Atlantic.

To celebrate the news, Naughty dog released another short in-game clip.

"In December we said that we're approaching this project as a true Uncharted game – complete with its own deep narrative with complex character development, all-new destinations, refined gameplay, and blockbuster cinematic moments," said Naughty Dog in a blog post.

"We're especially excited to have Chloe as our new protagonist and explore more of her story as she and Nadine venture across India in search of the fabled Tusk of Ganesh."

You might recognise the voice of Chloe as one of gaming's more prolific (and excellent) voice actors: Claudia Black. Her TV credits include Stargate SG1 and Farscape, but you may also know her as the voice of Morrigan in Dragon Age.

Those pre-ordering The Lost Legacy from participating retailers will also receive a free copy of Naughty Dog's platformer Jak and Daxter: The Precursor Legacy.